Abstract: A computer implemented method includes receiving eyewear parameters to form received eyewear parameters. A current computer model of eyewear is modified in accordance with an eyewear parameter that necessitates alteration of the current computer model to form a new computer model of the eyewear. The new computer model of the eyewear includes an altered hierarchical set of interconnected elements defining a rig and an altered surface representation around the rig defining a mesh that is manifold. The modifying operation is repeated for each eyewear parameter of the received eyewear parameters that necessitates alteration of the new computer model to form an output manifold mesh. Bespoke eyewear is manufactured from the output manifold mesh.